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Phasometry Methods in Polarized Neutron Reflectometry for Studying Magnetism of Layered Structures

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Abstract

Phasometry methods in polarized neutron reflectometry, which come down to measurement of the differences in the phases of reflection matrix elements, are considered. Basic formulas for extracting the phase differences from polarized neutron reflection data are presented. The phase information will supplement the data obtained with standard polarized neutron reflectometry. The external field at the sample requires a beam with a precession front parallel to the sample surface. Such a beam may be prepared using neutron spin manipulation optics. The effect of the external field on the magnetic state of the sample and instrumental depolarization due to the dependence of the spin precession angle in the external field on the wavelength and the neutron path length restrict the application of phasometry techniques. Measurements with the sample in zero field are found to be more promising.

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  1. Petersburg Nuclear Physics Institute, National Research Center “Kurchatov Institute”, 188300, Gatchina, Leningrad oblast, Russia

    N. K. Pleshanov

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  1. N. K. Pleshanov
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Correspondence to N. K. Pleshanov.

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Pleshanov, N.K. Phasometry Methods in Polarized Neutron Reflectometry for Studying Magnetism of Layered Structures. J. Surf. Investig. 16, 1263–1273 (2022). https://doi.org/10.1134/S1027451022060465

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  • DOI: https://doi.org/10.1134/S1027451022060465

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